Commutator



(No Model.) C. P. WINKLER.

GOMMUTATOR.

No. 412,350. Patented Oct. 8, 1889.

ATTORNEY.

UNITED STATES fnl PATENT -OEEICE.

CHARLES F. IVINKLER, OF I-IOOSICK FALLS, NEWT YORK.

COMMUTATOR.

SPECIFICATION forming part of Letters Patent No. 412,350, dated October 8, 1889.

Application tiled January 26, 1889. Serial No. 297,662. (No model.)

To @ZZ whom it may concern: L

Be it known that I, CHARLES F. WINKLER, a citizen of the United States, residing at Hoosick Falls, in the county of Rensselaer and State of New York, have invented certain neuT and useful Improvements in Cornmutators, of which the following is a full, clear, and exact speciiication.

My invention relates to dynamoelectric machines and motors, and has particular reference to an improvement in the armatures and com mutators for the same.

The object of the invention is an efficient apparatus of cheap construction.

The invention consists in the details of construction,which will be hereinafter described.

In the accompanying drawings, Figure l represents a perspective view of a dynamomachine, armature, and commutator constructed according to my invention. Fig. 2 is an elevation of the commutator end of the same. Fig. 3 is a partial longitudinal section of the armature and commutator. Fig. 4L is a detail view showing the manner of securing the parts of the commutator together.

In my armature I do not use a wire-winding; neither do I use a magnetic core of the ordinary construction. The particular construction of the armature is described in my application serially numbered 297,661, filed January 26, 1889.

Briefly stated, the armature consists of coils of fiat iron strips of some considerable width, the convolutions being separated by similar strips of insulating material. The armature is supported by a spider upon the shaft, in the usual manner, and the points where the spider joins with the supporting-core of the armature (which in this case may be of wood) is left free of the metallic strips in order to facilitate the mounting of the machine.

As shown, the armature is of the ordinary drum or Gramme type. The flat strips a constituting the coils are given several turns around the supporting-core b with strips of insulating material between, and they stand with their edges to the core and their flat sides in radial planes from the shaft. The

' thickness.

armature, the end of the coil finishing at the external diameter being carried around and down to a level with the internal diameter, in order that the two ends may be extended side by side. All the ends of the coils being extended in this manner the result is a cylindrical body supported directly by the armature and of less diameter than the same. The beginning and end of the adjacent coils are connected together in the usual manner, as shown, each pair of ends forming a commutator-segment. Of course, the insulatingstrip is removed from between the connected ends of the coils.

The details necessary to the completion of the commutator consist of blocks or plates of copper or other suitable metal c, which are attached to both or to one side of each of the joined extended ends of the coils by means of pins 'zT 1'., thus thickening the same for the purpose of iilling up the cylinder and giving each segmenta good contact-surface for the brush, and preventing sparking by excessive spaces between the segments. In addition to the copper plates there is inserted between each pair of the connected ends strips of insulating material c2 of small These serve the ordinary purpose of insulating material between the segments of a commutator. These are held in place by the same pins c' 'L'.

The periphery of the commutator portion is trued oif and given a smooth surface for the brushes. It will thus be seen that I have provided avery cheap form of commutator, and one which cannot be otherwise than eiiicient in its operation. I dispense entirely with. all forms of mounting for the commutator direct from the shaft.

Having now described my invention, I claim--x l. A commutator formed by joining the extended ends of the coils on the armature in couples, and re-enforcing said ends by at taching thereto a block of metal, a segment of insulation being placed between the ad- In witness whereof I have hereunto signed 1o joining re-enforoed ends, substantially as demy name in the presence of two subscribing soribed. witnesses.

2. The combination, with an armature,

' 5 of a commutator formed of the joined eX- CHARLES F. WINKLER.

tended ends of the coils of the armature, said ends being re-enforoed by metal blocks se- Witnesses: cured thereto by means of pins, substantially WILLIAM L. HALL,

as described. HENRY S. PRUYN. 

